r216566 (r216568 for 4.9 branch) added %{fno-lto} to LINK_COMMAND_SPEC.
However the linker doesn't understand -fno-lto and errors out.
This causes LTO/PGO bootstrap to fail, because -fno-lto is used during
STAGEprofile.
Fixed by filtering out -fno-lto in collect2.c.
LTO/PGO bootstrapped and tested on powerpc64-unknown-linux-gnu.
Preapproved by Jakub on IRC.
Applied to trunk and 4.9 branch.
2014-10-24 Markus Trippelsdorf <mar...@trippelsdorf.de>
PR bootstrap/63632
* collect2.c (main): Filter out -fno-lto.
PR bootstrap/63632
* g++.dg/torture/pr63632.C: New test.
diff --git a/gcc/collect2.c b/gcc/collect2.c
index c54e6fb51578..7c067ffcafbb 100644
--- a/gcc/collect2.c
+++ b/gcc/collect2.c
@@ -1311,6 +1311,12 @@ main (int argc, char **argv)
ld1--;
ld2--;
}
+ else if (strncmp (arg, "-fno-lto", 8) == 0)
+ {
+ /* Do not pass -fno-lto to the linker. */
+ ld1--;
+ ld2--;
+ }
#ifdef TARGET_AIX_VERSION
else
{
diff --git a/gcc/testsuite/g++.dg/torture/pr63632.C
b/gcc/testsuite/g++.dg/torture/pr63632.C
new file mode 100644
index 000000000000..48cd8692412a
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr63632.C
@@ -0,0 +1,5 @@
+// PR bootstrap/63632
+// { dg-do link }
+// { dg-options "-fno-lto" }
+
+int main () {}
--
Markus
